-LRB- CNN -RRB- -- Olympic figure skater Nancy Kerrigan Solomon tearfully pleaded Thursday for leniency for her brother , who was sentenced to prison on a lesser charge in his fatal altercation with their father .

A Middlesex County Superior Court judge sentenced Mark Kerrigan to 2.5 years after a jury convicted him Wednesday of assault and battery .

A jury acquitted Kerrigan on an involuntary manslaughter charge . The prosecution argued that the elder Kerrigan died from a heart attack caused during a physical struggle .

Solomon asked Judge Jane Haggerty for no prison time for her brother , saying the family had already suffered enough trauma and hardship .

`` None of us have had really the chance to grieve for our father , '' she said in court .

Mark Kerrigan was taken into custody immediately , said Cara O'Brien , spokeswoman for the Middlesex County District Attorney 's Office .

The judge sentenced Mark Kerrigan to serve two years in prison , followed by two years of probation , during which he will have to satisfy several conditions , including mental health and alcohol abuse treatment , according to O'Brien .

If Kerrigan completes all the conditions , the remaining six months of his prison sentence will be suspended , the judge ruled .

Mark Kerrigan showed little emotion as the verdict was read Wednesday in Woburn , Massachusetts .

`` My family has never believed at all that my brother had anything to do with my father 's death , '' Nancy Kerrigan said outside the courthouse . `` My dad would never have wanted any of this . ''

Prosecutors say Daniel Kerrigan , 70 , died after having an argument and physical confrontation with his intoxicated son .

A medical examiner had found that Daniel Kerrigan 's 2010 death came from cardiac dysrhythmia triggered by the brawl , which resulted in a larynx injury . Cardiac dysrhythmia is abnormal electrical activity in the heart .

Kerrigan 's family has said Daniel Kerrigan had a heart condition .

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Mark Kerrigan was acquitted of involuntary manslaughter

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He was convicted of assault and battery , sentenced to 2.5 years in prison

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2010 altercation between Kerrigan and his father preceded father 's death